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VHF radar observations of nonlinear interactions in the summer polar mesosphere

Authors
Journal
Journal of Atmospheric and Terrestrial Physics
0021-9169
Publisher
Elsevier
Publication Date
Volume
56
Issue
10
Identifiers
DOI: 10.1016/0021-9169(94)90067-1

Abstract

Abstract VHF radar measurements of velocities and echo power in the summer polar mesosphere have been analysed using maximum entropy, bispectral and cross-spectral methods in order to study wave-wave interactions. The results show nonlinear interactions of second and even third order between the diurnal and semidiurnal tides and planetary waves with periods of 2 and 3 days in the velocity field. Similar analyses of time series of echo power suggest corresponding variations of the temperature field.

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